稳定的多元件多相所有活性材料离子电池阳极
1Department of Chemical Engineering, University of Virginia, 102 Engineers Way, Charlottesville, Virginia 22904-4741, United States.
ACS applied materials & interfaces
|July 11, 2023
概括
开发先进的离子电池需要创新的电极设计. 使用TiNb2O7和MoO2混合物的多元件全活性材料 (AAM) 阳极显著提高体积能量密度,速率能力和周期寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 离子电池 (LIB) 对于储能至关重要,通过电极工程来提高能量密度.
- 全活性材料 (AAM) 电极在机械稳定性和离子传输方面具有优势,但需要具有良好的电子导电性和受控体积变化的电活性材料.
- TiNb2O7 (TNO) 和MoO2 (MO) 是AAM电极的有希望的材料,分别提供高体积能量密度和电子导电性.
研究的目的:
- 研究多元组件全活性材料 (AAM) 阳极,以提高离子电池的性能.
- 为了评估TiNb2O7 (TNO) 和MoO2 (MO) 的混合物作为AAM阳极,这是AAM电极开发中的一种新方法.
- 确定是否结合TNO和MO可以克服单个材料的局限性,以增强电化学循环.
主要方法:
- 由单元TNO,单元MO和各种TNO-MO混合物组成的全活性材料 (AAM) 阳极的制造和电化学测试.
- 电极架构和微观结构的表征,以了解组件比率的影响.
- 性能评估包括体积能量密度,速率能力和长期循环寿命.
主要成果:
- 多组件TNO-MO AAM阳极表现出优越的性能,相比单组件TNO和MO阳极.
- 结合TNO和MO的电极实现了最高的体积能量密度.
- 优化的TNO-MO混合物表现出增强的速率能力和延长的循环寿命,表明稳定性和导电性得到改善.
结论:
- 在AAM阳极中使用多元组件材料是推进离子电池技术的可行策略.
- 混合TiNb2O7和MoO2有效地利用它们各自的优势,从而显著改善能量密度,速率性能和循环稳定性.
- 这项研究为设计下一代储能系统的高性能AAM电极建立了新的途径.
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